Dark data is the information your company collects but never uses—often 55% of...

https://www.first-bookmarkings.win/dark-data-refers-to-the-inactive-or-unused-information-stored-by-an

Dark data is the information your company collects but never uses—often 55% of all stored data. Holding onto this inactive data increases storage and backup costs and raises your risk of ransomware or breaches